Congress' Summer Blues

Martha Teichner travels to the Thousand Islands in the St. Lawrence River, between northern New York state and Canada, in search of the complicated and controversial history of Thousand Island salad dressing.

Dale DeGroff, aka the King of Cocktails, is partly responsible for bringing America into the world of finely crafted cocktails. Seth Doane first met him when "Sunday Morning" celebrated the cocktail renaissance, and now, the cocktail king has blended a collection of saloon songs and well turned recipes into a barroom treat called "On The Town."

The French emperor Napoleon was exiled to a tiny island off the coast of Italy, and during his time there he helped modernize it. Mo Rocca reports on how Napoleon wound up on Elba - and how he plotted his escape.

If you're the sort of person who gets tired of incessant cell phone chatter and texting, there is a place for you: The National Radio Quiet Zone in Appalachia - 13,000 sq. miles where cell phones and WiFi are strictly forbidden, to prevent interference for radio telescopes. Correspondent Richard Schlesinger reports on this haven of quiet.

Garden Key in Florida's Dry Tortugas would be pretty unremarkable if it weren't for Fort Jefferson. Mo Rocca visits the 19th century military installation complete with 45-foot walls and a moat.

This "Sunday Morning" moment of nature takes you off shore at Mexico's San Benedicto Island.